Article
Optics
Miguel A. Porras
Summary: This study provides closed-form, analytical expressions for higher-order, multi-charged spatiotemporal optical vortices (STOVs) propagating in free space or non-dispersive media. The research considers two relevant situations: the freely spreading multi-charged STOV and the focused STOV. The breakup of the multi-charged STOV during spreading is due to diffraction, not instability. The focused STOV changes the sign of its topological charge when passing through the focus. While the spreading STOV carries transverse orbital angular momentum, the ideally focused STOV from the far field does not.
Article
Multidisciplinary Sciences
Changqing Xu, Ze-Guo Chen, Guanqing Zhang, Guancong Ma, Ying Wu
Summary: The study reports wave-steering capabilities enabled by high-order topological states in a 3D phononic crystal. Through careful design of boundary modes, two functionalities at different dimensions were demonstrated: 2D negative refraction and 3D acoustic interferometer.
Article
Optics
Liangwei Dong, Mingjing Fan, Boris A. Malomed
Summary: A model for trapping stable optical vortex solitons with high topological charges is proposed. By controlling the parameters of a ring-shaped modulation in a specific nonlinear medium, stable vortex solitons can be obtained, suggesting possibilities for applications in optics.
Article
Chemistry, Analytical
Wenhua Yan, Xudong Ren, Minkang Zhou, Zhongkun Hu
Summary: We propose a novel quantum magnetometer based on atoms' multi-wave (3-wave and 5-wave) Ramsey interference, which features high phase sensitivity and can be used for in situ measurements of the magnetic field inside vacuum chambers. The article presents an analytical solution for applicable interference fringe and simulates the decay of fringe contrast due to atom temperature and magnetic field gradient to estimate reasonable experimental conditions. Sensitivity functions for phase noise and magnetic field noise in a multi-wave system are derived to estimate the noise level required to reach the expected resolution. The validity of the model, dual-channel features on bias estimation, and the quasi-non-destructive detection feature are discussed.
Article
Optics
Nicholas Ossi, Sathyanarayanan Chandramouli, Ziad H. Musslimani, Konstantinos G. Makris
Summary: This paper introduces topological constant-intensity (TCI) waves in the context of non-Hermitian photonics. Unlike other known topological defects, these waves exhibit counterintuitive behavior with phase differences across space and no accompanying intensity variations. Such solutions only exist in non-Hermitian systems and are directly related to the real and imaginary parts of the potential.
Article
Computer Science, Artificial Intelligence
Olga E. Jumbo, Shihab Asfour, Ahmed M. Sayed, Mohamed Abdel-Mottaleb
Summary: Researchers use Zernike polynomial approximation to analyze the effects of Higher Order Aberrations (HOAs) on the human eye, creating a linear imaging system to simulate how the eye perceives source images. Through a cascade of two optical systems, source images are modified to be perceived without distortion at the retina, and Total Variation Regularization is employed to address blurring and loss of contrast introduced by this process, resulting in a 50% reduction in error with lower computational costs compared to existing methods using deconvolution and total variation regularization.
IEEE TRANSACTIONS ON IMAGE PROCESSING
(2021)
Article
Optics
Min Zhou, Zhe Zhang, Tao Zou, Laipeng Shao, Shen Liu, Zhiyong Bai, Yu Pang, Yu Liu, Yiping Wang
Summary: In this study, a multichannel OAM mode converter based on an elliptical-core helical intermediate-period fiber grating (E-HIPFG) is proposed and demonstrated. The converter can achieve +/- 2 order OAM mode conversion. The device has a short length and ultralow temperature drift, making it resistant to external disturbances.
Article
Optics
Rui Zhou, Hai Lin, Yanjie Wu, Zhifeng Li, Zihao Yu, Y. Liu, Dong-Hui Xu
Summary: The synchronized rotation of unit cells in a periodic structure provides a new design perspective for manipulating band topology. In this study, a two-dimensional version of a higher-order topological insulator (HOTI) is designed in a triangular photonic lattice with C-3 symmetry using such rotation. The HOTI supports zero-dimensional corner states and one-dimensional edge states simultaneously, and the photonic corner states carry chiral orbital angular momenta locked by valleys.
PHOTONICS RESEARCH
(2022)
Article
Physics, Multidisciplinary
Hao Ge, Shuai Liu, Xiang-Yuan Xu, Zi-Wei Long, Yuan Tian, Xiao-Ping Liu, Ming-Hui Lu, Yan-Feng Chen
Summary: The recent discovery of optical spatiotemporal (ST) vortex beams with transverse orbital angular momentum (OAM) has attracted attention and is expected to have practical applications in various fields. This study focuses on the development of ST vortex beams in acoustics and demonstrates the generation of Bessel-type ST acoustic vortex beams. The study provides a comprehensive characterization of the ST vortex beams and explores their versatility in controlling wave phenomena.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Yanlai Lv, Zijun Shang, Shiyao Fu, Lei Huang, Liliang Gao, Chunqing Gao
Summary: This study proposes a design of an OAM beam splitter based on a phase modulator, which can separate different OAM components into different positions and achieve OAM state probing. Experimental results demonstrate the good performance of the design and the ability to diagnose the OAM spectrum.
Article
Optics
Tristram J. Alexander, G. A. Tsolias, A. Demirkaya, Robert J. Decker, C. Martijn de Sterke, P. G. Kevrekidis
Summary: We theoretically demonstrate the existence of stable dark solitons in the presence of quartic dispersion and the coexistence of quadratic and quartic dispersive effects, revealing a wider range of solutions and dynamics compared to pure quadratic dispersion. The interplay of the two dispersion orders leads to oscillatory non-vanishing tails and the potential formation of bound, stable multi-soliton states. Additionally, dark soliton-like states connecting to low-amplitude oscillations are shown to be possible. The stability picture is supported by dynamical evolution results, and potential avenues for dark soliton generation are explored.
Article
Physics, Fluids & Plasmas
Szu-Cheng Cheng, Shih-Da Jheng, Ting-Wei Chen
Summary: In this study, the topological excitations of half-quantum vortices (HQVs) in a spinor exciton-polariton condensate were investigated, with the ability to control spin texture and topological charge through pumping mechanisms. The creation of polaritonic half-skyrmions under specific excitation conditions was demonstrated, along with the manipulation of spin flipping positions by varying pump polarization or power. Furthermore, the stable existence of HQVs was confirmed through linear stability analysis.
Article
Mechanics
Yanxun Zhou, Yimin Zhang, Guo Yao
Summary: This paper presents dynamic stability analysis of a rotating tapered cantilever beam made of bidirectional functionally graded materials with time-dependent rotating velocity. Various methods are used to establish the equation of motion and solve the dynamic instability problem. Results indicate that a second-order approximation is needed for better computation accuracy, and the effects of different parameters on natural frequencies and dynamic instability characteristics are discussed.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Van Luc Nguyen, Long H. Duong, Nam T. P. Le
Summary: The numerical investigation of the oblique collision and reconnection of a vortex ring and a vortex tube reveals different reconnection scenarios with an increasing number of reconnections as the collision angle increases. Additionally, the distribution of vortex structures varies at different collision angles.
Article
Physics, Applied
Shengxiang Shan, Shuo Liu, Xuejuan Liu, Yan Xiong, Yiping Xu, Shaohua Tao, Wenxing Yang, Shubo Cheng
Summary: This Letter investigates the modification of the phase profile of a self-rotating beam by introducing the radial shift factor c and the azimuthal shift factor Ω₀. The impact of the radial shift factor c on the intensity distribution is discussed, showing that the focal-field intensity patterns of the modified self-rotating beams move away from the center of the light field as the radial shift factor increases. The proposed beam array allows for arbitrary arrangement along the azimuthal direction and adjustable positioning of each self-rotating beam in the transverse plane, making it potentially useful for applications such as image transmission, data coding and decoding, and optical trapping.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Morten P. Bakker, Henk Snijders, Wolfgang Loffler, Ajit V. Barve, Larry A. Coldren, Dirk Bouwmeester, Martin P. van Exter
Article
Materials Science, Multidisciplinary
Morten P. Bakker, Thomas Ruytenberg, Wolfgang Loffler, Ajit Barve, Larry Coldren, Martin P. van Exter, Dirk Bouwmeester
Article
Materials Science, Multidisciplinary
Morten P. Bakker, Ajit V. Barve, Thomas Ruytenberg, Wolfgang Loffler, Larry A. Coldren, Dirk Bouwmeester, Martin P. van Exter
Article
Physics, Multidisciplinary
B. C. Hiesmayr, M. J. A. de Dood, W. Loffler
PHYSICAL REVIEW LETTERS
(2016)
Article
Multidisciplinary Sciences
H. Snijders, J. A. Frey, J. Norman, M. P. Bakker, E. C. Langman, A. Gossard, J. E. Bowers, M. P. van Exter, D. Bouwmeester, W. Loffler
NATURE COMMUNICATIONS
(2016)
Article
Multidisciplinary Sciences
F. Ricci, R. A. Rica, M. Spasenovic, J. Gieseler, L. Rondin, L. Novotny, R. Quidant
NATURE COMMUNICATIONS
(2017)
Article
Optics
F. Mariani, W. Loffler, M. Aas, O. S. Ojambati, P. Hong, W. L. Vos, M. P. van Exter
Article
Physics, Applied
H. Snijders, J. A. Frey, J. Norman, V. P. Post, A. C. Gossard, J. E. Bowers, M. P. van Exter, W. Loffler, D. Bouwmeester
PHYSICAL REVIEW APPLIED
(2018)
Article
Optics
J. A. Frey, H. J. Snijders, J. Norman, A. C. Gossard, J. E. Bowers, W. Loffler, D. Bouwmeester
Article
Physics, Multidisciplinary
Beatrix C. Hiesmayr, Wolfgang Loffler
Article
Physics, Multidisciplinary
H. J. Snijder, J. A. Frey, J. Norman, H. Flayac, V Savona, A. C. Gossard, J. E. Bowers, M. P. van Exter, D. Bouwmeester, W. Loffler
PHYSICAL REVIEW LETTERS
(2018)
Article
Chemistry, Multidisciplinary
F. Ricci, M. T. Cuairan, G. P. Conangla, A. W. Schell, R. Quidant
Article
Optics
Sameer Sonar, Vitaly Fedoseev, Matthew J. Weaver, Fernando Luna, Elger Vlieg, Harmen van der Meer, Dirk Bouwmeester, Wolfgang Loffler
Article
Optics
M. J. Weaver, D. Newsom, F. Luna, W. Loffler, D. Bouwmeester
Article
Optics
M. Massari, G. Ruffato, M. Gintoli, F. Ricci, F. Romanato
